Two　new　iron-based　selenites　AFe2(SeO3)4　(A　=　Sr　and　Hg)　have　been　successfully　obtained　via　a　hydrothermal　reaction.　Both　of　two　compounds　exhibit　a　classic　channel　structure,　where　SrFe2(SeO3)4　and　HgFe2(SeO3)4　crystallize　in　different　space　groups　of　triclinic　P-1　and　tetragonal　I-42d,　respectively.　Magnetic　measurements　indicate　that　SrFe2(SeO3)4　shows　a　collinear　antiferromagnetic　ordering　below　TN　=　23.5　K,　while　HgFe2(SeO3)4　undergoes　a　canted　antiferromagnetic　ordering　below　TN　=　34　K.　Further,　magnetic　anisotropy　of　HgFe2(SeO3)4　is　also　investigated　using　a　large-sized　single　crystal　sample,　confirming　magnetization　easy　a-b　plane　in　the　system.　Moreover,　the　optical　band-gaps　of　SrFe2(SeO3)4　and　HgFe2(SeO3)4　are　2.70　eV　and　2.77　eV　estimated　from　the　UV-vis　diffuse　reflectance　spectra,　indicating　that　they　may　be　semiconductors.